<Directory "/var/www">
Options All
AllowOverride None
Order Deny,Allow
Deny From all
Allow From 192.168.0.0/24
Allow From 127.0.0.1
Allow From 59.37.x.x/28

上面这一段的意思是对/var/www目录下面的文件,只允许从192.168.0/24 和 127.0.1、59.37.x.x/28这几个IP段内的用户访问.

下面的这一段与上面的刚好相反,禁止从192.168.0 和 127.0.1这两个字段内的用户访问.

<Directory "/var/www">
Options All
AllowOverride None
Order Deny,Allow
Allow From all
Deny From 192.168.0
Deny From 127.0.0.1

这里可以用include把想要限制访问的ip或者想要允许的ip写在一个文件里，把它包含进来，这样方便修改，例如

<Directory "/var/www">
Options All
AllowOverride None
Order Deny,Allow
Deny From all

include conf/ip.conf

然后在ip.conf中增加想要allow的ip，比如：

Allow From 192.168.0.0/24
Allow From 127.0.0.1
Allow From 59.37.x.x/28

这样方便以后修改